arm-protos.h (thumb1_legitimate_address_p): New prototype.

	* config/arm/arm-protos.h (thumb1_legitimate_address_p): New prototype.
	* config/arm/arm.c (thumb1_legitimate_address_p): Remove the static
	linkage.
	* config/arm/constraints.md (Uu): New constraint.
	* config/arm/arm.md (*arm_movqi_insn): Compute attr "length".

From-SVN: r172697

gcc/ChangeLog

+2011-04-19  Wei Guozhi  <carrot@google.com>
+
+	PR target/47855
+	* config/arm/arm-protos.h (thumb1_legitimate_address_p): New prototype.
+	* config/arm/arm.c (thumb1_legitimate_address_p): Remove the static
+	linkage.
+	* config/arm/constraints.md (Uu): New constraint.
+	* config/arm/arm.md (*arm_movqi_insn): Compute attr "length".
+
 2011-04-19  Tristan Gingold  <gingold@adacore.com>
 
 	* config.gcc (-*-*-*vms): Added.

gcc/config/arm/arm-protos.h

@@ -58,6 +58,7 @@ extern bool arm_legitimize_reload_address (rtx *, enum machine_mode, int, int,
 					   int);
 extern rtx thumb_legitimize_reload_address (rtx *, enum machine_mode, int, int,
 					    int);
+extern int thumb1_legitimate_address_p (enum machine_mode, rtx, int);
 extern int arm_const_double_rtx (rtx);
 extern int neg_const_double_rtx_ok_for_fpa (rtx);
 extern int vfp3_const_double_rtx (rtx);

gcc/config/arm/arm.c

@@ -5775,7 +5775,7 @@ thumb1_index_register_rtx_p (rtx x, int strict_p)
    addresses based on the frame pointer or arg pointer until the
    reload pass starts.  This is so that eliminating such addresses
    into stack based ones won't produce impossible code.  */
-static int
+int
 thumb1_legitimate_address_p (enum machine_mode mode, rtx x, int strict_p)
 {
   /* ??? Not clear if this is right.  Experiment.  */

gcc/config/arm/arm.md

@@ -5946,8 +5946,8 @@
 
 
 (define_insn "*arm_movqi_insn"
-  [(set (match_operand:QI 0 "nonimmediate_operand" "=r,r,r,m")
-	(match_operand:QI 1 "general_operand" "rI,K,m,r"))]
+  [(set (match_operand:QI 0 "nonimmediate_operand" "=r,r,l,Uu,r,m")
+	(match_operand:QI 1 "general_operand" "rI,K,Uu,l,m,r"))]
   "TARGET_32BIT
    && (   register_operand (operands[0], QImode)
        || register_operand (operands[1], QImode))"
@@ -5955,10 +5955,14 @@
    mov%?\\t%0, %1
    mvn%?\\t%0, #%B1
    ldr%(b%)\\t%0, %1
+   str%(b%)\\t%1, %0
+   ldr%(b%)\\t%0, %1
    str%(b%)\\t%1, %0"
-  [(set_attr "type" "*,*,load1,store1")
-   (set_attr "insn" "mov,mvn,*,*")
-   (set_attr "predicable" "yes")]
+  [(set_attr "type" "*,*,load1,store1,load1,store1")
+   (set_attr "insn" "mov,mvn,*,*,*,*")
+   (set_attr "predicable" "yes")
+   (set_attr "arch" "any,any,t2,t2,any,any")
+   (set_attr "length" "4,4,2,2,4,4")]
 )
 
 (define_insn "*thumb1_movqi_insn"

gcc/config/arm/constraints.md

@@ -36,6 +36,7 @@
 ;; The following memory constraints have been used:
 ;; in ARM/Thumb-2 state: Q, Ut, Uv, Uy, Un, Um, Us
 ;; in ARM state: Uq
+;; in Thumb state: Uu
 
 
 (define_register_constraint "f" "TARGET_ARM ? FPA_REGS : NO_REGS"
@@ -332,6 +333,14 @@
  (and (match_code "mem")
       (match_test "REG_P (XEXP (op, 0))")))
 
+(define_memory_constraint "Uu"
+ "@internal
+  In Thumb state an address that is valid in 16bit encoding."
+ (and (match_code "mem")
+      (match_test "TARGET_THUMB
+		   && thumb1_legitimate_address_p (GET_MODE (op), XEXP (op, 0),
+						   0)")))
+
 ;; We used to have constraint letters for S and R in ARM state, but
 ;; all uses of these now appear to have been removed.